The city of Melbourne intended CH2-the Council House 2 building, which opened in August 2006-to exemplify the best of high-performance, sustainable design as a model to other Australian cities. The 10-story, 135,000-sq-ft city office building occupies a dense block adjacent to an existing city building in the heart of Melbourne. It incorporates a number of radical strategies, like sewer mining for nonpotable water and the use of phase-changing materials in lieu of conventional chillers for cooling water. But it is the integration of these performance strategies, particularly in the building's mechanical systems, with the architecture that makes CH2 stand out as a case study, even for less ambitious projects and designers.
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